CGAL users discussion list

[Kim <>]

Hi everyone,

I am trying to clip a surface mesh using a closed PolygonMesh "shell" I am
importing from an external file. The section of the code in question looks
as follows:
CGAL::make_surface_mesh(c2t3,                  // Reconstructed mesh
(output)
                        surface,               // Implicit surface
                        criteria,              // Meshing criteria
                        CGAL::Manifold_tag()); // Require manifold mesh
PolygonMesh to_be_cut;
CGAL::facets_in_complex_2_to_triangle_mesh(c2t3, to_be_cut);
bool testing = CGAL::Polygon_mesh_processing::clip(to_be_cut, shell,
CGAL::parameters::clip_volume(true).use_compact_clipper(true));

This is giving me the followin error:
terminate called after throwing an instance of
'CGAL::Precondition_exception'
  what():  CGAL ERROR: precondition violation!
Expr: CGAL::is_valid_polygon_mesh(tm)
File: ./libs/CGAL-5.1/include/CGAL/Polygon_mesh_processing/orientation.h

Since if I save the output of make_surface_mesh to a file and read the file
back in to a "PolygonMesh to_be_cut" the clipper has no problems, the
problem must lie in going from c2t3 to polygonMesh but I can't seem to
figure out how to make it work. Hopefully someone can help.

Kind regards,
Kim




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